Charge-Discharge Circuit for Motor-Based Battery Self-Heating

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Solution Overview

Problem

Current battery self-heating solutions are singular and costly, and the impedance parameters during the battery heating process cannot be adjusted, leading to inefficiencies and reduced adaptability in meeting diverse heating demands, particularly in dual-drive motor scenarios.

Innovation Solution

A charge-discharge circuit and control method that utilizes alternating current generated by a charge-discharge loop between a drive motor and a battery, allowing flexible adjustment of the charge-discharge loop without altering the motor structure, by controlling the on-off state of phase bridge arms and connecting motor neutral points to achieve battery self-heating.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If traditional battery self-heating solutions are used, then heating function is achieved, but system complexity and cost increase

Engineering Contradiction:

Improvebattery heating capabilityVSAvoidsystem complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The patent enables the battery to heat itself by utilizing its own charge-discharge loop and the motor's inductance as an impedance element. The battery's inherent electrical components (inductance and resistance) are used to generate heat through controlled charge-discharge cycles, eliminating the need for external heating devices or additional impedance components.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent makes the motor serve dual functions: both as a drive motor and as an impedance element for battery heating. By controlling the motor controller's switch module, the motor's inductance is utilized during heating mode, allowing the same component to perform both propulsion and heating functions without requiring separate dedicated heating components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If traditional battery self-heating solutions are used, then heating function is achieved, but adaptability to different scenarios is reduced

Engineering Contradiction:

Improvebattery heating capabilityVSAvoidadaptability to different scenarios

Core Design Contradiction:

TemperatureVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic control of the battery heating process by adjusting the duty cycle and frequency of the motor controller's switch module. This allows real-time modulation of the charge-discharge loop parameters, enabling the system to adapt heating intensity and duration to match different temperature requirements and operational scenarios.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the electrical parameters (current, voltage, frequency) of the battery charge-discharge loop to achieve different heating effects. By controlling the motor controller to operate in different modes with varying electrical parameters, the system can adapt to diverse heating demands without requiring hardware modifications.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If fixed impedance parameters are used during battery heating, then circuit simplicity is maintained, but heating efficiency is reduced

Engineering Contradiction:

Improvecircuit simplicityVSAvoidheating efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent dynamically adjusts the impedance parameters of the heating circuit by controlling the motor controller's switch module. The equivalent impedance is adjusted through parameter changes in the switch module's duty cycle and frequency, allowing optimization of heating efficiency without adding complex impedance adjustment circuits or components.

Inventive Principle:

Principle #35Parameter changes

4Productivity

If high peak currents are used for battery heating, then heating rate is improved, but system stress and energy loss increase

Engineering Contradiction:

Improveheating rateVSAvoidenergy loss

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent employs periodic charge-discharge cycles instead of continuous high current discharge. By controlling the motor controller to switch between charging and discharging phases, the system generates controlled peak currents that create resistive heating in the battery's internal resistance, achieving efficient heating while allowing energy recovery during the charging phase and reducing overall energy loss.

Inventive Principle:

Principle #19Periodic action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables flexible adaptation of battery heating to meet various scenario demands, reducing costs and improving heating efficiency by adjusting impedance parameters and reducing peak currents.

Implementation Method 1

utilizing alternating current generated by a charge-discharge loop between a drive motor and a battery to achieve battery self-heating

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

achieving battery self-heating

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS20260074317A1Charge-discharge circuit, method, computing device, and control apparatus

Publication Date: 2026.03.12 CONTEMPORARY AMPEREX TECHNOLOGY CO LTD

AI summary

A charge-discharge circuit, a method, a computing device, and a control apparatus thereof, where a regulation switch module is connected between a first energy storage element and a second switch module, utilizing an alternating current generated by a charge-discharge loop between a drive motor and a battery to achieve battery self-heating.